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I just picked up a Sigma 28-80 F3.5-5.6 Aspherical Macro HF Mini Zoom for the
Canon EOS 300D (Digital Rebel). I bought this lens primarily because it
had 1:2 macro functionality that I could increase to 1:1 with a diopter kit.
Oh, I got one of those as well. It is a Tiffen +1, +2, +4 kit. These are
basically magnifying glasses so you can increase the size of the image.
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| Tiffen Diopter kit in a cute
little pouch |
Kit with the lens |
Here is the first test picture with the new lens. This picture was taken
without a diopter lens. The first two are from our Christmas Tree.
The last is from a salad on the table.
I decided I would try a test of the diopter lenses and the depth of field on
the new lens. I had taken a few gag pictures and one of those was coffee.
It came out pretty neat so I thought I would use it as the test subject.
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| Shot 1. This was taken
without any diopter correction. The shutter was on 15 seconds
and the aperture was at F29. The larger aperture setting gives a good depth
of field. Meaning everything is in focus. |
Shot 2. This was taken with the
+1 diopter ring. You can see how the beans appear a little larger and the
image is cropped. This was shot with the same shutter and aperture settings. |
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| Shot 3. This was shot with the
+4 and +1 rings on the lens. Same shutter and aperture settings. There is a
dramatic difference in how close you can get with the two rings together |
This is a cropped from the shot
4. I wanted to demonstrate the detail the Eos 300D can provide.
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| Shot 4. This is the same as the
above shot, but the shutter was set to 30 seconds. F29 is a VERY dark
aperture which allows a great depth of field. Depth of field is another way
of saying focus planes. The sides and center of the picture are very
crisp and in focus. However, this does not allow much light into the
camera which is why it was shot with a 30 second exposure. |
Shot 5. This is at the same shot
as shot 4. However, the shutter was set for 1 second and the aperture was
"opened-up" to F5.6. The reduces the depth of field to a very narrow
focal plane. You can see that the bean in the center is very crisp.
The ones further out are slight out of focus. |
